Reversible propeller



July 6,1926. 1,591,405

R. w. SHAW REVERSIBLE PROPELLER- Filed May Q7, 1924 Patented Jul 6,- 1926.

v UNITED ST TE ROBERT WILLIAM SHAW, or AL ANY, NEW.YORK,.,

m mas rnornrrnn.

A pplicat ion filed May 27, 1924. Serial No. 716,233.

This inventionrelates to propeller construction and aims to provide a, propeller scribed and claimed, it being understood that changes in the precise embodiment of V propeller? 7 ng to the drawing'in detail, the ref-' erence character-'5] designates the hub of the struction, the same beingformed with a key-- positioned.

I wherein the blades or flukes are so construct-- ed that when the propeller is operated to move its supporting body forwardly, the vrear flukes will act to assist in moving the body forwardly, eliminating the usual drag,

bination and arrangement of parts and inthe details of construction hereinafter dethe invention herein disclosed, maybe made within the scope of'what is claimed, without departing from the spirit of the inven tion.

Referring to the drawing:

Figure l isa front elevational view of a propeller constructed in accordance with the 1 invention.

F1 gure 2 Referri propeller which maybe of any'desired conway 6 whereby the propeller may be keyed to the propeller shaft on which the same is Secured to opposite sides of the bearing 5 and'arranged diagonally thereacross, in opposite directions, are the blades 7 and 8,. which constitute the forward blades of'the propeller, while the blades 9 and 10 which extend in the opposite directions, constitute the rear blades orflukes of the propeller. p

is aside elevational view of the As shown the forwardblade 7 is-curved PATENT OFFICE, f

outwardly and due to the. angle at which the same is supported on-the hub 5, the

blade curves slightly rearwardly. The blade 8 is also curved rearwardly as clearly shown by Figure '1' of the drawing,the rear blades 9 and 10 are separated from the forward blades? and 8, at points adjacent to their outer ends, so that as the propeller rotates,

the blades'may cut into the body of water in which the propeller is operated to force the supporting body through the water according to the direction of'rotation of the propeller.

.From the foregoing it will be seen that due to the construction of-the propeller-and the pitch of the blades, both the forward and rear blades of the propeller will operate to force the supporting body through the water,- eliminating the usual drag caused by the rear blades ofpropellers now in use.

It m'ightbe also stated that upon reverse movement of the propeller tomove the supporting body rearwardly through-the water,

the rear propeller-blades cut into the water in a mannerto pull the supporting blades,

ments.

I cla1m:

'while the forward blades also cut into the I water to assist the rear blades in their movep p a I p y 75 Ina propeller of the'class described, a'hub section, integral blade sections extending from the hub and having their side faces disposedat obliqueangleswith respect to the ends of the hub', said blades being split throughout their lengths providing flukes, the flukes adjacent to one'end of the hub beposed laterally and forwardly, and the flukes at the opposite end of the hub being curved throughout their lengths and disposed laterally and rearwardly. In testimonyfthat ture. m. i ROBERT WILLIAM SHAW.

mg curved throughout their lengths and dis-r I claim the foregoing V as my own, I have hereto aflixed my signa 

